Wire-transposing device



a ulllllgl'mm f2 inn-mm Aug. 29, 1944. R, CASE 2,356,750

WIRE-TRANSPOS ING DEVICE Filed Feb. 9, 1943 2 Sheets-Sheet 1 INVENTOR .Wafs Ca/ss las @$701,147

A118- 29, 1944. R. CASE WIRE-TRAN'SPOS ING DEVICE Filed Feb. 9, 1943 2Sheets-Sheet 2 Patented Aug. 29, 1944 UNITED STATES PATENT OFFICEWIRE-TRANSPOSING DEVICE ltogers Case, Orange, N. J. Application February9, 1943, Serial No. 475,286 s claims( (ci. 17e-3a) This inventionrelates to wire-transposing and resistance-balancing devices applicableto parallel paired wires to change their positions relative to eachother.

In the telephone art, the capacity of a pair of transmission wires forsimultaneously transmitting multiple messages hasbeen greatly increasedover previously used systems by development of the so-called. carriersystem. Successful use of the said system, however, requirestransposition and balancing of the paired transmission wires at uniformdistances, whereas the older phantom system has been somewhat flexible,some variation in the'spacing of transposition points being permissible.This permissible variation in spacing of transposition points in thephantom system, together with the difiiculties in spacing telephonepoles at equal distances; due to ground conditions, and the generalpractice of transposing wires at points of support on poles, has causedtransmission wires that have been installed for use in "phantcm systemsto be transposed at unequally spaced points and therefore to beunsuitable for conversion to carrier" systems.A Alteration of thetransposition and resistance-balancing points to suit carriertransmission has heretofore involved such great expense, due tonecessity for resetting poles, cutting and splicing wires, etc., as torender such conversion prohibitive.

'I'he object of this invention is to provide a device for transposingand balancing paired wires carried by the wires themselves so that itmay be positioned at any point along a transmission line; which iscapable of installation on wires that are already strung without cuttingthe wires or disassembling the device, and which is arranged to affordadequate resistance to the crushing strain exerted by the wirestensioned upon such a device.

In the accompanying drawings:

Fig. I'is a perspective view of the wire-transposing and balancingdevice.

Fig. II is an elevation thereof, partially broken.

Fig. III is a plan view showing the arrangement of two suchwire-transposing devices with respect to a pair of wires.

Describing the drawings in detail, the transposition and balancingdevice includes a base in the form of a plate I, desirably open-centeredfor lightness and saving in material and preferably of square outline. Apair of insulators designated 2 is mounted upon one surface of the plateand;

a second pair designated 3 is mounted on the other surface of the plate,to project oppositely those upon one side of the plate are located atdifferently diagonally opposed angles of a rectangle at the corners ofwhich the four .insulators are arranged. Thus the insulators 2 of thedrawings are located at diagonallyopposed angles of the square at thecorners of which they and the other insulators 3 are arranged, and theinsulators 3 are located at the other diagonally opposed angles ofsuchsquare.

The insulators 2 and 3 are advantageously of spool type as shown and aremounted with their ends seated against the surfaces of the plate l byheader pins 4 that penetrate the plate and central bores of theinsulators and are secured in assembly by transverse cotter pins 5.

In service, each of the respective transmission wires, designated 6 and1, is trained around opposite outer regions 8 of the lateral surfaces ofthe insulators forming one of the pairs, and extended between them anddiagonally of the rectangle at the corners of which they are located.

To resist the overturning strains imposed upon thc insulators and theirpin fastenings by the wires, each insulator is braced. This isaccomplished by a strap 9 one end of which overlies the outer end of theinsulator and is penetrated by the pin thereof, the strap being angledinwardly toward the plate to which its end is suitably secured, as by arivet I0. These straps 9 are so arranged relative to the system ofinsulators 2 and 3 as to leave clear passages extended between the outersurface regions 8 of the paired insulators 2 and 3, and thereby avoidstructures blocking or interfering with lateral insertion of continuouswires to the positions shown in Fig. III. The straps 9 are also arrangedcompressively to oppose the thrust exerted upon the insulators by wirestrained about them in the indicated manner. Thus the straps 9 oi' all ofthe insulators extend from such insulators in directions opposite to theregions 8 in the lateral surfaces of the insulators; the brace for eachinsulator of a pair being extended toward an insulator on the oppositeside of the base which lies on a same side of the rectangle formed bythe insulators, and to connection with the base plate I. For simplicitythe ends of the straps are superposed and are secured to oppositesurfaces of the plate by a single rivet I0. The arrangement is such thateach insulator has but one brace, so that the bracing is on two oppOSitesides of the rectangle.

It will be understood from the above that the device is readilyapplicable to paired wires, already strung in a transmission system,whether the system be old or new. slack which exists in all extendedreaches of wires no matter how tightly they are strung, is collected inthe region in which the transposition device is to be inserted. Thiscollection is made in any suitable manner, as by the use of acome-along. Without disturbing the assembly organization of the device,it is then placed between the slackened wires, and by manipulation ofther wires and the device one of the conductors A is caused laterally toenter the clear space between the insulators of one diagonal pair tobear against the outer surface region of both insulators of that pair,so that the slack in the wire is used to form a diagonal reach aextended in contact with the outer surface regions of the insulators.Similarly the slack of the other conductor wire B is caused to bearagainst the outer surfaces of the insulators of the other diagonal pair,being extended between them in a diagonal reach b.

After being mounted in such manner, each transposition device may beadjusted along the wires to correct any slight lack of uniformity of thereaches of wires which it defines with the reaches between other pointsof transposition and resistance balancing established by other similardevices. When mounted the transposition device is held securely by theadditional tensioning of the wires caused by the deflection incident totheir transposition.

It will be noted that the installation of my transposition deviceinvolves neither cutting the wires, nor a disassernbiing andreassembling of the device to place it in proper position with respectto the wires. Cutting and splicing long continuous lengths of wireA iswell known to be undesirable. In the eld, and in an operation like theoperation of mounting a series of transposition devices in accuratelyspaced., relation with the other along two conductor wires, theoperation of reassembling the device on the wires is awkward andpresents considerable difficulty. The transposition andresistance-balancing device of my invention thus presents substantialadvantage over prior devices, such as the transposition device disclosedn United States Patent No. '110,206 to OBrien et al.. in whichinsulators are so engaged between two frame elements that it isnecessary either to cut the wires or disassemble the devices in order toinstall them.

It is apparent that, although the base plate of my device, from whichthe insulators oppositely project, is shown as itself of rectangularform and as having" an open center, that detail structure is notessential to a desirable embodiment of my invention. Many other changesin form and arrangement may be made Within the bounds of my invention asdefined by the appended claims.

I claim as my invention:

1. A position-transposing and balancing device In installation the forpaired wires comprising a base, pairs of spaced insulators mounted onopposite sides of the base in approximately rectangular arrangement, thesaid pairs of insulators on each side of the base respectivehr beinglocated at diagonally opposed angles of the approximately rectangleformed by their arrangement cooperatively to receive by lateralinsertion a continuous strung conductor wire trained thereon.

2. A position-transposing and balancing device for paired wirescomprising a, base, pairs of insulators mounted on opposite sides of thebase, the insulators of each of the said pairs being located at thedifferent diagonally opposed angles of an approximate rectangle, andbraces for the said insulators extended therefrom to connection with thebase, the said braces being arranged to provide clear space diagonallyextended between opposite outer surfaces of the respective insulatorsupon each side of the base for lateral insertion of continuous wirestrained around the said opposite sides of the pairs of insulators.

3. A position-transposing and balancing device for paired wirescomprising a base, pairs of spaced insulators mounted on opposite sidesof the base and projecting therefrqm, the said pairs of insulators beinglocated at the different diagonally opposed angles of an approximaterectangle formed by the arrangement of the said insulators for receptionby lateral insertion of diagonally crossed continuous strung 4wirescontacting the outer surfaces of the insulators of the respective pairs.

4. A position-transposing and balancing device for paired wirescomprising a base, pairs of spool-form insulators mounted on oppositesides of the base and projecting therefrom, the said pairs of insulatorsbeing located at the different diagonally opposed angles of anapproximate rectangle formed by the arrangement of the said insulators,and bracing straps extended from the free ends of the insulators toconnection with the baseI the braces for the two cooperative insulatorson each side of the base being extended in directions to oppose thethrust of wires upon the respective insulators by wires trained aroundtheir opposite outer side and extended between them diagonally of theapproximate rectangle formed by the arrangement of the said insulators.

lators against the thrust of wires bearing thereagainst.

B OGERS CASE.

